Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2676
CALL
First Financial Bancorp
FFBC
$3.55B
| $1.18M | ﹤0.01% |
44,000
-7,000
| -14% | -$191K |
|
2677
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.18M | ﹤0.01% |
204,245
+90,362
| +79% | +$609K |
|
|
NOVA
2678
PUT
DELISTED
Sunnova Energy
NOVA
| $1.18M | ﹤0.01% |
344,300
-100,800
| -23% | -$505K |
|
2679
PUT
Vanguard FTSE Europe ETF
VGK
$30B
| $1.18M | ﹤0.01% |
21,000
-113,500
| -84% | -$7.58M |
|
2680
CALL
Yelp
YELP
$1.38B
| $1.18M | ﹤0.01% |
30,400
+5,700
| +23% | +$208K |
|
2681
CALL
Clearwater Paper
CLW
$271M
| $1.18M | ﹤0.01% |
39,500
+35,100
| +798% | +$952K |
|
2682
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $1.17M | ﹤0.01% |
6,000
-1,000
| -14% | -$200K |
|
2683
Fabrinet
FN
$17.1B
| $1.17M | ﹤0.01% |
+5,323
| New | +$1.28M |
|
|
SGI
2684
Somnigroup International
SGI
$15.1B
| $1.17M | ﹤0.01% |
20,652
+11,189
| +118% | +$597K |
|
|
AZPN
2685
DELISTED
Aspen Technology Inc
AZPN
| $1.17M | ﹤0.01% |
+4,688
| New | +$1.14M |
|
|
NARI
2686
CALL
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $1.17M | ﹤0.01% |
22,900
+4,100
| +22% | +$202K |
|
2687
CALL
Teucrium Agricultural Fund
TAGS
$19.6M
| $1.17M | ﹤0.01% |
199,300
-70,400
| -26% | -$1.81M |
|
2688
PUT
Beazer Homes USA
BZH
$907M
| $1.16M | ﹤0.01% |
42,400
-18,300
| -30% | -$584K |
|
2689
CALL
Expeditors International
EXPD
$22.9B
| $1.16M | ﹤0.01% |
10,500
+2,700
| +35% | +$322K |
|
|
SUM
2690
PUT
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $1.16M | ﹤0.01% |
23,000
+20,100
| +693% | +$939K |
|
2691
PUT
Euronet Worldwide
EEFT
$3.02B
| $1.16M | ﹤0.01% |
11,300
+4,500
| +66% | +$458K |
|
2692
CALL
Kinsale Capital Group
KNSL
$7.95B
| $1.16M | ﹤0.01% |
2,500
-6,700
| -73% | -$3.17M |
|
2693
Toronto Dominion Bank
TD
$198B
| $1.16M | ﹤0.01% |
+21,835
| New | +$1.22M |
|
2694
CALL
Star Bulk Carriers
SBLK
$3.14B
| $1.16M | ﹤0.01% |
77,600
-247,700
| -76% | -$4.6M |
|
2695
CALL
Lennox International
LII
$18.8B
| $1.16M | ﹤0.01% |
1,900
-3,000
| -61% | -$1.88M |
|
2696
Waste Management
WM
$95.9B
| $1.16M | ﹤0.01% |
+5,732
| New | +$1.23M |
|
2697
CALL
Endava
DAVA
$141M
| $1.16M | ﹤0.01% |
37,400
+5,700
| +18% | +$156K |
|
2698
CALL
Ametek
AME
$55.5B
| $1.15M | ﹤0.01% |
6,400
-8,200
| -56% | -$1.49M |
|
2699
PUT
Ball Corp
BALL
$17B
| $1.15M | ﹤0.01% |
20,900
-15,600
| -43% | -$956K |
|
2700
CALL
Vaalco Energy
EGY
$594M
| $1.15M | ﹤0.01% |
263,700
+41,800
| +19% | +$222K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.